blockchain with negative blockreward. POB instead of POW.

[agorism]

How about using POB for the mining.
The blockreward would be negative.

Have the ratio satoshis/bitcoin re-adjust every block, to maintain 21,000,000 bitcoin total. People who invest in coins will watch the number of coins they own magically grow.

Blocktime is now dependent upon demand. If lots of people are trying to send txs at once, then blocks go faster.

The miner should demand enough fees from customers to pay the negative blockreward, and make a small profit.
instead of caring about number of confirmations, you care about how many coins were burned since your txs was included. If you are accepting 1000 coins, then you should wait for the transaction to be at least 1000 coins deep before shipping the product.

I think that this coin would require no POW, except for anti-spam.

[agorism]

I explore this in more detail here: https://github.com/zack-bitcoin/hash-slinging-slasher

A pure POB currency does not work.

I think slasher+POB might be secure, and not require any POW at all.